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I am currently running Moble 1 10-30 (regular blend). Based on seemingly a high number spun bearings with the realitively thin M1 5-30 and 10-30 I am considering changing to the M1 10-30 extended performance or the Castrol Syntec European blend 0-30. I am a bit nervous of running a 0-30 here in Georgia in the summer (seems thin for so hot). Any thoughts / comments.

Is there a database / spreadsheet on BITOG that compares oils? I am not a frequent visitor to that site, but thought I remembered some several years back.

Check out BITOG some more and you'll see that the German Castrol isn't any thinner, in fact it's one of the thickest 30w oils out there.

You might run into problems though because from what I've seen in the Autozones around me and on what people say on BITOG, german Castrol isn't going to be imported anymore. I wiped out my local Autozone's supply a few weeks ago and they have yet to stock it with more.

I've checked the 3 autozones near me and I have come up empty on the Castrol 0-30. I am wanting something that is readily available and realitively inexpensive (under $8/qt). Now I am thinking the M1 10-30 EP or the M1 0-40. Thoughts on these or any other suggestions?

M1 0W40 is considered by some to be their best 30 weight because of shearing. It's probably good though. The new M1 10W30 High Mileage is also ACEA A3 rated (like GC). I would use that before the 10W30 EP. You could also consider Rotella 5W40. The folks at bitog love the diesel oils for their robust additive packs.

Look a little closer in your owners manual. While the viscosity is not listed, I use valvoline synpower 5w40. I know my engine wont last as long with this oil compared to mobil1 5w30. Engine oil is the constant male worry wort topic we have.

Look a little closer in your owners manual. While the viscosity is not listed, I use valvoline synpower 5w40. I know my engine wont last as long with this oil compared to mobil1 5w30. Engine oil is the constant male worry wort topic we have.

...d0000000d...it may very well last a LOT longer using an oil better suited to the engine than that piss that everyone thinks they 'have to use'....